When living off campus you do not have resident assistants to mediate conflicts, and you cannot just move to a new apartment if you are not getting along with your roommate(s). If you will be living with others, even if you have lived with them before in the residence hall or you are close friends, you should consider the following questions prior to living together to avoid conflict:
For a sample roommate agreement see the Off-Campus Roommate Guide
If you are looking for a roommate, Orange Housing maintains a listing of students who have apartments and are looking for roommates to fill a vacancy. If you are looking for someone to rent an apartment with, you may want to ask staff at your school/college, as they may know of students who are looking for a roommate and will be able to connect you